Hi,
what you can always do is to add a 5W 3dB attenuator to the PA input to lower the worst VSWR to 2:1.
Or you can change the internal 3dB to a 6dB attenuator.
In both cases you will need a double power at the?PA?input to get the same PA output power as now.
In the first case you will also loose 3dB at the receive.
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73 Bojan S53DZ